1. 方法一
try chagne
$this->curlOption(CURLOPT_SSL_CIPHER_LIST, 'TLSv1');
to
$this->curlOption(CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);
源自:http://magento.stackexchange.com/a/73957
2. 方法二
In file downloader/lib/Mage/HTTP/Client/Curl.php
I changed the code
$this->curlOption(CURLOPT_SSL_CIPHER_LIST, 'TLSv1');
to
if(isset($var)){$this->curlOption(CURLOPT_SSL_CIPHER_LIST, 'TLSv1');}
and problem will be solved for now.